1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "aot/aotLoader.hpp"
28 #include "classfile/classLoader.hpp"
29 #include "classfile/classLoaderDataGraph.hpp"
30 #include "classfile/stringTable.hpp"
31 #include "classfile/systemDictionary.hpp"
32 #include "code/codeCache.hpp"
33 #include "compiler/compileBroker.hpp"
34 #include "compiler/compilerOracle.hpp"
35 #include "interpreter/bytecodeHistogram.hpp"
36 #include "jfr/jfrEvents.hpp"
37 #include "jfr/support/jfrThreadId.hpp"
38 #if INCLUDE_JVMCI
39 #include "jvmci/jvmciCompiler.hpp"
40 #include "jvmci/jvmciRuntime.hpp"
41 #endif
42 #include "logging/log.hpp"
43 #include "logging/logStream.hpp"
44 #include "memory/oopFactory.hpp"
45 #include "memory/resourceArea.hpp"
46 #include "memory/universe.hpp"
47 #include "oops/constantPool.hpp"
48 #include "oops/generateOopMap.hpp"
49 #include "oops/instanceKlass.hpp"
50 #include "oops/instanceOop.hpp"
51 #include "oops/method.hpp"
52 #include "oops/objArrayOop.hpp"
53 #include "oops/oop.inline.hpp"
54 #include "oops/symbol.hpp"
55 #include "prims/jvmtiExport.hpp"
56 #include "runtime/arguments.hpp"
57 #include "runtime/biasedLocking.hpp"
58 #include "runtime/compilationPolicy.hpp"
59 #include "runtime/deoptimization.hpp"
60 #include "runtime/flags/flagSetting.hpp"
61 #include "runtime/init.hpp"
62 #include "runtime/interfaceSupport.inline.hpp"
63 #include "runtime/java.hpp"
64 #include "runtime/memprofiler.hpp"
65 #include "runtime/sharedRuntime.hpp"
66 #include "runtime/statSampler.hpp"
67 #include "runtime/sweeper.hpp"
68 #include "runtime/task.hpp"
69 #include "runtime/thread.inline.hpp"
70 #include "runtime/timer.hpp"
71 #include "runtime/vmOperations.hpp"
72 #include "services/memTracker.hpp"
73 #include "utilities/dtrace.hpp"
74 #include "utilities/globalDefinitions.hpp"
75 #include "utilities/histogram.hpp"
76 #include "utilities/macros.hpp"
77 #include "utilities/vmError.hpp"
78 #ifdef COMPILER1
79 #include "c1/c1_Compiler.hpp"
80 #include "c1/c1_Runtime1.hpp"
81 #endif
82 #ifdef COMPILER2
83 #include "code/compiledIC.hpp"
84 #include "compiler/methodLiveness.hpp"
85 #include "opto/compile.hpp"
86 #include "opto/indexSet.hpp"
87 #include "opto/runtime.hpp"
88 #endif
89 #if INCLUDE_JFR
90 #include "jfr/jfr.hpp"
91 #endif
92
93 GrowableArray<Method*>* collected_profiled_methods;
94
95 int compare_methods(Method** a, Method** b) {
96 // %%% there can be 32-bit overflow here
97 return ((*b)->invocation_count() + (*b)->compiled_invocation_count())
98 - ((*a)->invocation_count() + (*a)->compiled_invocation_count());
99 }
100
101 void collect_profiled_methods(Method* m) {
102 Thread* thread = Thread::current();
103 methodHandle mh(thread, m);
104 if ((m->method_data() != NULL) &&
105 (PrintMethodData || CompilerOracle::should_print(mh))) {
106 collected_profiled_methods->push(m);
107 }
108 }
109
110 void print_method_profiling_data() {
111 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData) &&
112 (PrintMethodData || CompilerOracle::should_print_methods())) {
113 ResourceMark rm;
114 HandleMark hm;
115 collected_profiled_methods = new GrowableArray<Method*>(1024);
116 SystemDictionary::methods_do(collect_profiled_methods);
117 collected_profiled_methods->sort(&compare_methods);
118
119 int count = collected_profiled_methods->length();
120 int total_size = 0;
121 if (count > 0) {
122 for (int index = 0; index < count; index++) {
123 Method* m = collected_profiled_methods->at(index);
124 ttyLocker ttyl;
125 tty->print_cr("------------------------------------------------------------------------");
126 m->print_invocation_count();
127 tty->print_cr(" mdo size: %d bytes", m->method_data()->size_in_bytes());
128 tty->cr();
129 // Dump data on parameters if any
130 if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) {
131 tty->fill_to(2);
132 m->method_data()->parameters_type_data()->print_data_on(tty);
133 }
134 m->print_codes();
135 total_size += m->method_data()->size_in_bytes();
136 }
137 tty->print_cr("------------------------------------------------------------------------");
138 tty->print_cr("Total MDO size: %d bytes", total_size);
139 }
140 }
141 }
142
143
144 #ifndef PRODUCT
145
146 // Statistics printing (method invocation histogram)
147
148 GrowableArray<Method*>* collected_invoked_methods;
149
150 void collect_invoked_methods(Method* m) {
151 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) {
152 collected_invoked_methods->push(m);
153 }
154 }
155
156
157
158
159 void print_method_invocation_histogram() {
160 ResourceMark rm;
161 HandleMark hm;
162 collected_invoked_methods = new GrowableArray<Method*>(1024);
163 SystemDictionary::methods_do(collect_invoked_methods);
164 collected_invoked_methods->sort(&compare_methods);
165 //
166 tty->cr();
167 tty->print_cr("Histogram Over Method Invocation Counters (cutoff = " INTX_FORMAT "):", MethodHistogramCutoff);
168 tty->cr();
169 tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
170 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0,
171 synch_total = 0, nativ_total = 0, acces_total = 0;
172 for (int index = 0; index < collected_invoked_methods->length(); index++) {
173 Method* m = collected_invoked_methods->at(index);
174 int c = m->invocation_count() + m->compiled_invocation_count();
175 if (c >= MethodHistogramCutoff) m->print_invocation_count();
176 int_total += m->invocation_count();
177 comp_total += m->compiled_invocation_count();
178 if (m->is_final()) final_total += c;
179 if (m->is_static()) static_total += c;
180 if (m->is_synchronized()) synch_total += c;
181 if (m->is_native()) nativ_total += c;
182 if (m->is_accessor()) acces_total += c;
183 }
184 tty->cr();
185 total = int_total + comp_total;
186 tty->print_cr("Invocations summary:");
187 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total);
188 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total);
189 tty->print_cr("\t%9d (100%%) total", total);
190 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total);
191 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total);
192 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total);
193 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total);
194 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total);
195 tty->cr();
196 SharedRuntime::print_call_statistics(comp_total);
197 }
198
199 void print_bytecode_count() {
200 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
201 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value());
202 }
203 }
204
205 AllocStats alloc_stats;
206
207
208
209 // General statistics printing (profiling ...)
210 void print_statistics() {
211 #ifdef ASSERT
212
213 if (CountRuntimeCalls) {
214 extern Histogram *RuntimeHistogram;
215 RuntimeHistogram->print();
216 }
217
218 if (CountJNICalls) {
219 extern Histogram *JNIHistogram;
220 JNIHistogram->print();
221 }
222
223 if (CountJVMCalls) {
224 extern Histogram *JVMHistogram;
225 JVMHistogram->print();
226 }
227
228 #endif
229
230 if (MemProfiling) {
231 MemProfiler::disengage();
232 }
233
234 if (CITime) {
235 CompileBroker::print_times();
236 }
237
238 #ifdef COMPILER1
239 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
240 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
241 Runtime1::print_statistics();
242 Deoptimization::print_statistics();
243 SharedRuntime::print_statistics();
244 }
245 #endif /* COMPILER1 */
246
247 #ifdef COMPILER2
248 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
249 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
250 Compile::print_statistics();
251 #ifndef COMPILER1
252 Deoptimization::print_statistics();
253 SharedRuntime::print_statistics();
254 #endif //COMPILER1
255 os::print_statistics();
256 }
257
258 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
259 OptoRuntime::print_named_counters();
260 }
261
262 if (TimeLivenessAnalysis) {
263 MethodLiveness::print_times();
264 }
265 #ifdef ASSERT
266 if (CollectIndexSetStatistics) {
267 IndexSet::print_statistics();
268 }
269 #endif // ASSERT
270 #else // COMPILER2
271 #if INCLUDE_JVMCI
272 #ifndef COMPILER1
273 if ((TraceDeoptimization || LogVMOutput || LogCompilation) && UseCompiler) {
274 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && TraceDeoptimization);
275 Deoptimization::print_statistics();
276 SharedRuntime::print_statistics();
277 }
278 #endif // COMPILER1
279 #endif // INCLUDE_JVMCI
280 #endif // COMPILER2
281
282 if (PrintAOTStatistics) {
283 AOTLoader::print_statistics();
284 }
285
286 if (PrintNMethodStatistics) {
287 nmethod::print_statistics();
288 }
289 if (CountCompiledCalls) {
290 print_method_invocation_histogram();
291 }
292
293 print_method_profiling_data();
294
295 if (TimeCompilationPolicy) {
296 CompilationPolicy::policy()->print_time();
297 }
298 if (TimeOopMap) {
299 GenerateOopMap::print_time();
300 }
301 if (ProfilerCheckIntervals) {
302 PeriodicTask::print_intervals();
303 }
304 if (PrintSymbolTableSizeHistogram) {
305 SymbolTable::print_histogram();
306 }
307 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
308 BytecodeCounter::print();
309 }
310 if (PrintBytecodePairHistogram) {
311 BytecodePairHistogram::print();
312 }
313
314 if (PrintCodeCache) {
315 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
316 CodeCache::print();
317 }
318
319 // CodeHeap State Analytics.
320 // Does also call NMethodSweeper::print(tty)
321 if (PrintCodeHeapAnalytics) {
322 CompileBroker::print_heapinfo(NULL, "all", "4096"); // details
323 } else if (PrintMethodFlushingStatistics) {
324 NMethodSweeper::print(tty);
325 }
326
327 if (PrintCodeCache2) {
328 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
329 CodeCache::print_internals();
330 }
331
332 if (PrintVtableStats) {
333 klassVtable::print_statistics();
334 klassItable::print_statistics();
335 }
336 if (VerifyOops && Verbose) {
337 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
338 }
339
340 print_bytecode_count();
341 if (PrintMallocStatistics) {
342 tty->print("allocation stats: ");
343 alloc_stats.print();
344 tty->cr();
345 }
346
347 if (PrintSystemDictionaryAtExit) {
348 ResourceMark rm;
349 MutexLocker mcld(ClassLoaderDataGraph_lock);
350 SystemDictionary::print();
351 ClassLoaderDataGraph::print();
352 }
353
354 if (LogTouchedMethods && PrintTouchedMethodsAtExit) {
355 Method::print_touched_methods(tty);
356 }
357
358 if (PrintBiasedLockingStatistics) {
359 BiasedLocking::print_counters();
360 }
361
362 // Native memory tracking data
363 if (PrintNMTStatistics) {
364 MemTracker::final_report(tty);
365 }
366
367 ThreadsSMRSupport::log_statistics();
368 }
369
370 #else // PRODUCT MODE STATISTICS
371
372 void print_statistics() {
373
374 if (PrintMethodData) {
375 print_method_profiling_data();
376 }
377
378 if (CITime) {
379 CompileBroker::print_times();
380 }
381
382 if (PrintCodeCache) {
383 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
384 CodeCache::print();
385 }
386
387 // CodeHeap State Analytics.
388 // Does also call NMethodSweeper::print(tty)
389 if (PrintCodeHeapAnalytics) {
390 CompileBroker::print_heapinfo(NULL, "all", "4096"); // details
391 } else if (PrintMethodFlushingStatistics) {
392 NMethodSweeper::print(tty);
393 }
394
395 #ifdef COMPILER2
396 if (PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
397 OptoRuntime::print_named_counters();
398 }
399 #endif
400 if (PrintBiasedLockingStatistics) {
401 BiasedLocking::print_counters();
402 }
403
404 // Native memory tracking data
405 if (PrintNMTStatistics) {
406 MemTracker::final_report(tty);
407 }
408
409 if (LogTouchedMethods && PrintTouchedMethodsAtExit) {
410 Method::print_touched_methods(tty);
411 }
412
413 ThreadsSMRSupport::log_statistics();
414 }
415
416 #endif
417
418 // Note: before_exit() can be executed only once, if more than one threads
419 // are trying to shutdown the VM at the same time, only one thread
420 // can run before_exit() and all other threads must wait.
421 void before_exit(JavaThread* thread) {
422 #define BEFORE_EXIT_NOT_RUN 0
423 #define BEFORE_EXIT_RUNNING 1
424 #define BEFORE_EXIT_DONE 2
425 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
426
427 // Note: don't use a Mutex to guard the entire before_exit(), as
428 // JVMTI post_thread_end_event and post_vm_death_event will run native code.
429 // A CAS or OSMutex would work just fine but then we need to manipulate
430 // thread state for Safepoint. Here we use Monitor wait() and notify_all()
431 // for synchronization.
432 { MutexLocker ml(BeforeExit_lock);
433 switch (_before_exit_status) {
434 case BEFORE_EXIT_NOT_RUN:
435 _before_exit_status = BEFORE_EXIT_RUNNING;
436 break;
437 case BEFORE_EXIT_RUNNING:
438 while (_before_exit_status == BEFORE_EXIT_RUNNING) {
439 BeforeExit_lock->wait();
440 }
441 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
442 return;
443 case BEFORE_EXIT_DONE:
444 // need block to avoid SS compiler bug
445 {
446 return;
447 }
448 }
449 }
450
451 #if INCLUDE_JVMCI
452 // We are not using CATCH here because we want the exit to continue normally.
453 Thread* THREAD = thread;
454 JVMCIRuntime::shutdown(THREAD);
455 if (HAS_PENDING_EXCEPTION) {
456 HandleMark hm(THREAD);
457 Handle exception(THREAD, PENDING_EXCEPTION);
458 CLEAR_PENDING_EXCEPTION;
459 java_lang_Throwable::java_printStackTrace(exception, THREAD);
460 }
461 #endif
462
463 // Hang forever on exit if we're reporting an error.
464 if (ShowMessageBoxOnError && VMError::is_error_reported()) {
465 os::infinite_sleep();
466 }
467
468 EventThreadEnd event;
469 if (event.should_commit()) {
470 event.set_thread(JFR_THREAD_ID(thread));
471 event.commit();
472 }
473
474 JFR_ONLY(Jfr::on_vm_shutdown();)
475
476 // Stop the WatcherThread. We do this before disenrolling various
477 // PeriodicTasks to reduce the likelihood of races.
478 if (PeriodicTask::num_tasks() > 0) {
479 WatcherThread::stop();
480 }
481
482 // shut down the StatSampler task
483 StatSampler::disengage();
484 StatSampler::destroy();
485
486 // Stop concurrent GC threads
487 Universe::heap()->stop();
488
489 // Print GC/heap related information.
490 Log(gc, heap, exit) log;
491 if (log.is_info()) {
492 ResourceMark rm;
493 LogStream ls_info(log.info());
494 Universe::print_on(&ls_info);
495 if (log.is_trace()) {
496 LogStream ls_trace(log.trace());
497 MutexLocker mcld(ClassLoaderDataGraph_lock);
498 ClassLoaderDataGraph::print_on(&ls_trace);
499 }
500 }
501
502 if (PrintBytecodeHistogram) {
503 BytecodeHistogram::print();
504 }
505
506 if (JvmtiExport::should_post_thread_life()) {
507 JvmtiExport::post_thread_end(thread);
508 }
509
510 // Always call even when there are not JVMTI environments yet, since environments
511 // may be attached late and JVMTI must track phases of VM execution
512 JvmtiExport::post_vm_death();
513 Threads::shutdown_vm_agents();
514
515 // Terminate the signal thread
516 // Note: we don't wait until it actually dies.
517 os::terminate_signal_thread();
518
519 print_statistics();
520 Universe::heap()->print_tracing_info();
521
522 { MutexLocker ml(BeforeExit_lock);
523 _before_exit_status = BEFORE_EXIT_DONE;
524 BeforeExit_lock->notify_all();
525 }
526
527 if (VerifyStringTableAtExit) {
528 size_t fail_cnt = StringTable::verify_and_compare_entries();
529 if (fail_cnt != 0) {
530 tty->print_cr("ERROR: fail_cnt=" SIZE_FORMAT, fail_cnt);
531 guarantee(fail_cnt == 0, "unexpected StringTable verification failures");
532 }
533 }
534
535 #undef BEFORE_EXIT_NOT_RUN
536 #undef BEFORE_EXIT_RUNNING
537 #undef BEFORE_EXIT_DONE
538 }
539
540 void vm_exit(int code) {
541 Thread* thread =
542 ThreadLocalStorage::is_initialized() ? Thread::current_or_null() : NULL;
543 if (thread == NULL) {
544 // very early initialization failure -- just exit
545 vm_direct_exit(code);
546 }
547
548 if (VMThread::vm_thread() != NULL) {
549 // Fire off a VM_Exit operation to bring VM to a safepoint and exit
550 VM_Exit op(code);
551 if (thread->is_Java_thread())
552 ((JavaThread*)thread)->set_thread_state(_thread_in_vm);
553 VMThread::execute(&op);
554 // should never reach here; but in case something wrong with VM Thread.
555 vm_direct_exit(code);
556 } else {
557 // VM thread is gone, just exit
558 vm_direct_exit(code);
559 }
560 ShouldNotReachHere();
561 }
562
563 void notify_vm_shutdown() {
564 // For now, just a dtrace probe.
565 HOTSPOT_VM_SHUTDOWN();
566 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
567 }
568
569 void vm_direct_exit(int code) {
570 notify_vm_shutdown();
571 os::wait_for_keypress_at_exit();
572 os::exit(code);
573 }
574
575 void vm_perform_shutdown_actions() {
576 if (is_init_completed()) {
577 Thread* thread = Thread::current_or_null();
578 if (thread != NULL && thread->is_Java_thread()) {
579 // We are leaving the VM, set state to native (in case any OS exit
580 // handlers call back to the VM)
581 JavaThread* jt = (JavaThread*)thread;
582 // Must always be walkable or have no last_Java_frame when in
583 // thread_in_native
584 jt->frame_anchor()->make_walkable(jt);
585 jt->set_thread_state(_thread_in_native);
586 }
587 }
588 notify_vm_shutdown();
589 }
590
591 void vm_shutdown()
592 {
593 vm_perform_shutdown_actions();
594 os::wait_for_keypress_at_exit();
595 os::shutdown();
596 }
597
598 void vm_abort(bool dump_core) {
599 vm_perform_shutdown_actions();
600 os::wait_for_keypress_at_exit();
601
602 // Flush stdout and stderr before abort.
603 fflush(stdout);
604 fflush(stderr);
605
606 os::abort(dump_core);
607 ShouldNotReachHere();
608 }
609
610 void vm_notify_during_cds_dumping(const char* error, const char* message) {
611 if (error != NULL) {
612 tty->print_cr("Error occurred during CDS dumping");
613 tty->print("%s", error);
614 if (message != NULL) {
615 tty->print_cr(": %s", message);
616 }
617 else {
618 tty->cr();
619 }
620 }
621 }
622
623 void vm_exit_during_cds_dumping(const char* error, const char* message) {
624 vm_notify_during_cds_dumping(error, message);
625
626 // Failure during CDS dumping, we don't want to dump core
627 vm_abort(false);
628 }
629
630 void vm_notify_during_shutdown(const char* error, const char* message) {
631 if (error != NULL) {
632 tty->print_cr("Error occurred during initialization of VM");
633 tty->print("%s", error);
634 if (message != NULL) {
635 tty->print_cr(": %s", message);
636 }
637 else {
638 tty->cr();
639 }
640 }
641 if (ShowMessageBoxOnError && WizardMode) {
642 fatal("Error occurred during initialization of VM");
643 }
644 }
645
646 void vm_exit_during_initialization() {
647 vm_notify_during_shutdown(NULL, NULL);
648
649 // Failure during initialization, we don't want to dump core
650 vm_abort(false);
651 }
652
653 void vm_exit_during_initialization(Handle exception) {
654 tty->print_cr("Error occurred during initialization of VM");
655 // If there are exceptions on this thread it must be cleared
656 // first and here. Any future calls to EXCEPTION_MARK requires
657 // that no pending exceptions exist.
658 Thread *THREAD = Thread::current(); // can't be NULL
659 if (HAS_PENDING_EXCEPTION) {
660 CLEAR_PENDING_EXCEPTION;
661 }
662 java_lang_Throwable::print_stack_trace(exception, tty);
663 tty->cr();
664 vm_notify_during_shutdown(NULL, NULL);
665
666 // Failure during initialization, we don't want to dump core
667 vm_abort(false);
668 }
669
670 void vm_exit_during_initialization(Symbol* ex, const char* message) {
671 ResourceMark rm;
672 vm_notify_during_shutdown(ex->as_C_string(), message);
673
674 // Failure during initialization, we don't want to dump core
675 vm_abort(false);
676 }
677
678 void vm_exit_during_initialization(const char* error, const char* message) {
679 vm_notify_during_shutdown(error, message);
680
681 // Failure during initialization, we don't want to dump core
682 vm_abort(false);
683 }
684
685 void vm_shutdown_during_initialization(const char* error, const char* message) {
686 vm_notify_during_shutdown(error, message);
687 vm_shutdown();
688 }
689
690 JDK_Version JDK_Version::_current;
691 const char* JDK_Version::_runtime_name;
692 const char* JDK_Version::_runtime_version;
693
694 void JDK_Version::initialize() {
695 jdk_version_info info;
696 assert(!_current.is_valid(), "Don't initialize twice");
697
698 void *lib_handle = os::native_java_library();
699 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t,
700 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0"));
701
702 assert(func != NULL, "Support for JDK 1.5 or older has been removed after JEP-223");
703
704 (*func)(&info, sizeof(info));
705
706 int major = JDK_VERSION_MAJOR(info.jdk_version);
707 int minor = JDK_VERSION_MINOR(info.jdk_version);
708 int security = JDK_VERSION_SECURITY(info.jdk_version);
709 int build = JDK_VERSION_BUILD(info.jdk_version);
710
711 // Incompatible with pre-4243978 JDK.
712 if (info.pending_list_uses_discovered_field == 0) {
713 vm_exit_during_initialization(
714 "Incompatible JDK is not using Reference.discovered field for pending list");
715 }
716 _current = JDK_Version(major, minor, security, info.patch_version, build,
717 info.thread_park_blocker == 1,
718 info.post_vm_init_hook_enabled == 1);
719 }
720
721 void JDK_Version_init() {
722 JDK_Version::initialize();
723 }
724
725 static int64_t encode_jdk_version(const JDK_Version& v) {
726 return
727 ((int64_t)v.major_version() << (BitsPerByte * 4)) |
728 ((int64_t)v.minor_version() << (BitsPerByte * 3)) |
729 ((int64_t)v.security_version() << (BitsPerByte * 2)) |
730 ((int64_t)v.patch_version() << (BitsPerByte * 1)) |
731 ((int64_t)v.build_number() << (BitsPerByte * 0));
732 }
733
734 int JDK_Version::compare(const JDK_Version& other) const {
735 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
736 uint64_t e = encode_jdk_version(*this);
737 uint64_t o = encode_jdk_version(other);
738 return (e > o) ? 1 : ((e == o) ? 0 : -1);
739 }
740
741 void JDK_Version::to_string(char* buffer, size_t buflen) const {
742 assert(buffer && buflen > 0, "call with useful buffer");
743 size_t index = 0;
744
745 if (!is_valid()) {
746 jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
747 } else {
748 int rc = jio_snprintf(
749 &buffer[index], buflen - index, "%d.%d", _major, _minor);
750 if (rc == -1) return;
751 index += rc;
752 if (_security > 0) {
753 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _security);
754 if (rc == -1) return;
755 index += rc;
756 }
757 if (_patch > 0) {
758 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _patch);
759 if (rc == -1) return;
760 index += rc;
761 }
762 if (_build > 0) {
763 rc = jio_snprintf(&buffer[index], buflen - index, "+%d", _build);
764 if (rc == -1) return;
765 index += rc;
766 }
767 }
768 }